Upvoted for discussion, but I disagree. Communicating on Steem is like talking in public. If one of your neighbors is giving dangerous advice, would you call the police? No, you'd tell them they're wrong, and you might tell your children not to listen to them.

One thing Steemit or any other front-end could do is showing a warning when the health tag is used, like the medical disclaimer that Wikipedia displays in some languages. "Don't take medical advice from a random blogger, consult a doctor if you're ill."

Making retaliatory flagging impossible is an interesting proposal, but it would be complicated and would have unwanted consequences. We may need to downvote some vandal who is flagging others just to annoy them. As soon as there's any conflict, an anti-retaliation rule would lead to preemptive strikes: I flag you before you can flag me.

When you're an innocent victim of heavy flagging, try to recruit others to help you by posting about it.

In general, nobody's promising that a free market in ideas will be perfect. The whole point of a free market is that it will be better than a system that tries to avoid any risk.